My motto has always been:
कर्मण्येवाधिकारस्ते मा फलेषु कदाचन।
मा कर्मफलहेतुर्भूर्मा ते सङ्गोऽस्त्वकर्मणि।। 2.47।।
(Shrimad Bhagwat Geeta Chapter 2, Shloka 47)
The meaning of the sanskrit shloka as given by Swami Gambiranand is "Your right is for action alone, never for the results. Do not become the agent of the results of action. May you not have any inclination for inaction."
(Ref: https://www.gitasupersite.iitk.ac.in/ )
“Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young.”
― Henry Ford